Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

6 hosts · 279 ms

HostCertsFirst seenLast seen
uniqlo.ca 2 2025-09-28 2026-08-29
*.uniqlo.ca 2 2025-09-28 2026-08-29
mta-sts.uniqlo.ca 1 2026-01-22 2026-01-22
m.enews.uniqlo.ca 1 2025-11-18 2025-11-18
res.enews.uniqlo.ca 1 2025-11-18 2025-11-18
t.enews.uniqlo.ca 1 2025-11-18 2025-11-18

Programmatic access: API GET /v1/hosts/uniqlo.ca (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/uniqlo.ca.